At work you might be in a large space, you probably don't have long contact with any one person (when contact tracing it seems they ask who you've been in conta

At work you might be in a large space, you probably don't have long contact with any one person (when contact tracing it seems they ask who you've been in contact with for >15 minutes, not sure if they're still doing that), and you're wearing a mask. None of that might be true for a family gathering.